| 摘要: |
| 根据2019—2021年江苏省13个市的近地面风速、风向及细颗粒物（PM2.5）的小时监测结果, 计算不同风速区间频度及PM2.5污染贡献占比的影响。结果表明, 风速区间频度及PM2.5污染贡献占比对监测点位的影响存在一定差异。在固定点位周边半径7 km内，绝对影响风速频度为78.9%，PM2.5贡献占比为82.4%；半径3 km内，直接影响风速频度为70.4%，PM2.5贡献占比为80.6%。从区域变化来看，0~3 m/s风速区间内，各市风速频度贡献为59.4%~92.0%，平均值为78.9%。以南京、连云港某大气自动站为例，站点的PM2.5贡献占比、影响风速频度与站点半径呈反比例关系。 |
| 关键词: 气象风速 固定点位 细颗粒物 污染贡献 江苏省 |
| DOI： |
| 分类号:X823 |
| 基金项目:江苏省环境监测科研基金资助项目（1723）；江苏省科技项目创新能力建设计划（研发机构）基金资助项目（BM2022036） |
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| Study on the Fixed Station’s Contribution of PM2.5 Pollutants in the Influence of Near surface Meteorological Wind Speed |
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DING Ming,YU Jian-qiao,ZHONG Sheng
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Jiangsu Provincial Environmental Monitoring Center, Nanjing,Jiangsu 210036,China
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| Abstract: |
| Based on the hourly monitoring results of surface wind speed, wind direction and fine particles (PM2.5) in 13 cities of Jiangsu Province in 2019—2021, the influence of the frequency of wind speed range and the percentage of PM2.5 contribution were figured out. The results show that the influence on research area fixed station is different between the frequency of wind speed range and the percentage of PM2.5 contribution. In general, within the radius of 7 km, the influence probability of wind speed is 78.9% and the contribution of PM2.5 is 82.4%. Within a radius of 3 km, the frequency of near surface wind speed is 70.4%, and the contribution of PM2.5 is 80.6%. From the perspective of regional variation, the frequency of 0～3 m/s wind speed range is 59.4%~92.0%, with an average value of 78.9%. In Nanjing and Lianyungang, the proportion of PM2.5 contribution and the frequency of wind speed are inversely proportional to the site radius. |
| Key words: Meteorological wind speed Fixed station PM2.5 Monitoring Contribution of Pollutants Jiangsu Province |
